2026 NPPES data Allergy & Immunology (Internal Medicine) Physician NPI 1548381866 MD
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TIMOTHY KYIN, MD

Allergy & Immunology (Internal Medicine) Physician in CHARLOTTESVILLE, Virginia. CMS National Plan and Provider Enumeration System profile including specialty classification, practice address, and Medicare prescribing data when reported.

Federal data — no proprietary rating. PlainDoctor publishes the actual CMS NPPES and Medicare records — NPI registration, specialty, practice location, and prescribing data — without a composite score or editorial opinion on top. Every field traces to a federal source.
Prescribing volume
468
Medicare Part D claims · 122 beneficiaries · Allergy & Immunology (Internal Medicine) Physician avg: 798
Generic prescribing
56%
generic claims · 44% brand-name · higher generic rates reduce patient out-of-pocket costs
MIPS score
79.3949/100
▼ 4 pts below national avg 83.1 · [object Object]
What the federal data reveals: TIMOTHY KYIN, MD is a Allergy & Immunology (Internal Medicine) Physician ([object Object]) practicing in CHARLOTTESVILLE, Virginia with a Medicare Part D prescribing footprint of 468 claims across 122 beneficiaries — 44% brand-name prescribing . Their CMS MIPS Final Score of 79.3949/100 (national average: 83.1) reflects performance across Quality, Cost, Interoperability, and Improvement Activities .

What stands out: TIMOTHY KYIN, MD reported a CMS MIPS final score of 79.3949 out of 100, below the 83.1 national average, and filed 468 Medicare Part D claims in 2023. Every figure on this page comes straight from federal CMS records, with no proprietary rating applied.

Board certification likely (heuristic — not verified)

TIMOTHY KYIN, MD practices in an ABMS-board-eligible specialty and shows active CMS Medicare participation + MIPS quality reporting + 1 hospital affiliation — signals consistent with board-certified status. For verified board certification, see CertificationMatters.org (the official ABMS public lookup).

TIMOTHY KYIN, MD at a glance

Near national average

NPI registry status

Active

Issued 04/03/2007

NPI 1548381866

Primary specialty

Allergy & Immunology (Internal Medicine) Physician

Niche

520 US NPIs in this specialty

Medicare Part D claims

468 41% vs specialty avg

2023 prescription claims

Specialty avg: 798

MIPS final score

79.3949/100 3.7050999999999874% pts

Above neutral band

vs 83.1 national avg

Specialty distribution in Virginia

How Allergy & Immunology (Internal Medicine) Physician compares to other specialties among Virginia providers

Virginia providers

Allergy & Immunology (Internal Medicine) Physician share within Virginia

1. Allergy & Immunology (Internal Medicine) Physician42%2. Internal medicine21%3. Family medicine17%4. Surgical12%5. Pediatric8%
Allergy & Immunology (Internal Medicine) Physician share within Virginia

Medicare quality performance — MIPS

TIMOTHY KYIN, MD's 2023 MIPS final score plotted against the Allergy & Immunology (Internal Medicine) Physician national average

Near national average
MIPS Final Score
79.3949/100
vs 83.1 national avg · 2023 performance year

MIPS final score (Allergy & Immunology (Internal Medicine) Physician) — 79.3949/100 vs national avg 83.1

0%100%National avg83%79.4%
MIPS final score (Allergy & Immunology (Internal Medicine) Physician) — 79.3949/100 vs national avg 83.1

The Merit-based Incentive Payment System (MIPS) scores providers 0–100 across four performance categories: Quality, Cost, Promoting Interoperability, and Improvement Activities, weighted under 42 CFR §414.1380. Reporting is voluntary for many small practices, so absence of a MIPS score is not a quality signal.

Board certification through an ABMS or AOA member board signals voluntary post-licensure examination plus continuous Maintenance of Certification cycles. Verify any individual provider's status through certificationmatters.org (ABMS) or osteopathic.org (AOA).

TIMOTHY KYIN, MD is a Allergy & Immunology (Internal Medicine) Physician provider practicing in CHARLOTTESVILLE, Virginia, according to the CMS National Plan and Provider Enumeration System (NPPES). Credentials: MD. NPI: 1548381866. This profile includes practice location, specialty classification, and organizational affiliations from the CMS provider registry. Provider information is self-reported to CMS and updated monthly.

TIMOTHY KYIN, MD appears in the CMS NPPES registry as a Allergy & Immunology (Internal Medicine) Physician provider holding MD credentials at 2955 IVY RD, CHARLOTTESVILLE, VA, 22903, with a listed phone of (434) 924-2227. NPI 1548381866 was issued on 04/03/2007. Because NPPES data is self-reported by the provider and refreshed monthly, the address, phone, and specialty reflect what KYIN most recently submitted to CMS rather than a vetted directory listing, which is why patients should always confirm the practice is still at this location before scheduling.

Medicare Part D records for calendar year 2023 show 468 prescription claims written by this provider, covering 122 Medicare beneficiaries and totaling roughly $400K in drug spend, split 44% brand-name and 56% generic by claim count. These figures capture only Medicare Part D — commercial insurance, Medicaid, and cash-pay prescriptions are not included, and any drug-beneficiary cell under 11 is suppressed by CMS for patient privacy. On the CMS Merit-based Incentive Payment System, this provider earned a Final Score of 79.3949/100 for the 2023 performance year (Quality 73.6607, Cost 57.6556), compared with the national average of 83.1.

Allergy & Immunology (Internal Medicine) Physician is a narrow specialty nationwide, with 520 enrolled providers across 48 states and an average of 798 Part D claims per prescriber, so the context for interpreting these metrics differs meaningfully from a primary-care baseline. Important: PlainDoctor is a directory of publicly available government data, not medical advice, a malpractice database, or a quality rating. Inclusion here does not imply a recommendation, and absence of complaints or sanctions on this page does not mean none exist — always verify credentials through the NPPES NPI Registry, your state medical board, and the ABMS or AOA before making healthcare decisions.

Practice Address

2955 IVY RD
CHARLOTTESVILLE, VA 22903

Provider Details

NPI 1548381866
Specialty Allergy & Immunology (Internal Medicine) Physician
Credentials MD
Gender Male
NPI Issued 04/03/2007

CMS Quality Score (MIPS)

Merit-based Incentive Payment System (MIPS) scores from CMS, 2023 performance year.

79.3949
Final Score
Avg: 83.1
73.6607
Quality
57.6556
Cost
100
Promoting Interoperability

Reporting: Group practice

Hospital and facility affiliations

Facilities where TIMOTHY KYIN, MD bills Medicare from. Star ratings (1-5) are CMS Hospital Compare's "Hospital overall rating" — a composite of mortality, readmission, patient experience, safety, timely care, and efficient use of medical imaging measures. Source: CMS Care Compare.

UNIVERSITY OF VIRGINIA PHYSICIANS GROUP
LYNCHBURG, VA

Affiliations sourced from CMS Doctors and Clinicians National Downloadable File; hospital ratings from CMS Hospital General Information dataset (cross-referenced by facility name + state).

Brand vs generic prescribing mix · Above average

TIMOTHY KYIN, MD — brand share 44.0%
Specialty average (est.)

44% brand-name claims vs 56% generic, on 468 2023 Medicare Part D claims.

The federal Medicare Part D Generic Dispensing Rate national benchmark sits near 90% generic / 10% brand for primary-care prescribers, per CMS Office of the Actuary 2024 estimates. Higher brand share is common in specialty prescribing where generic equivalents are not available.

Medicare Part D Prescribing Data

CMS Medicare Part D prescriber-level data for calendar year 2023.

468
Total Claims
$400K
Total Drug Cost
122
Medicare Beneficiaries

Prescribing Breakdown

30-Day Fills
731
Total Day Supply
20,303
Brand vs Generic
44% brand / 56% generic
Brand Drug Cost
$368K
Generic Drug Cost
$32K

Patient Demographics

Average Patient Age
67.8 years
Avg HCC Risk Score
1.15
Gender Split
68% female / 32% male

Top Prescribed Drugs (Medicare Part D)

Top drugs by claim count for calendar year 2023. Based on Medicare Part D data only.

Drug Claims
Montelukast Sodium
115
Prednisone
47
Symbicort
Budesonide/Formoterol Fumarate
35
Xolair
Omalizumab
29
Nucala
Mepolizumab
24
Ipratropium Bromide
22
Albuterol Sulfate Hfa
Albuterol Sulfate
21
Dupixent Syringe
Dupilumab
20
Epinephrine
17
Fluticasone Propionate
14

* Counts below 11 are suppressed by CMS for patient privacy. Generic names shown where available from CMS Part D data.

Allergy & Immunology (Internal Medicine) Physician Overview

How TIMOTHY KYIN, MD fits within the Allergy & Immunology (Internal Medicine) Physician landscape nationally.

520
Allergy & Immunology (Internal Medicine) Physician Providers in US
48
States with Allergy & Immunology (Internal Medicine) Physician
798
Avg Claims per Provider

TIMOTHY KYIN, MD's 468 claims are below the specialty average of 798.

Nearby Allergy & Immunology (Internal Medicine) Physician Providers in Virginia

Other clinicians with the same primary specialty enrolled in Virginia, drawn from the same CMS NPPES roster as KYIN.

Compare Allergy & Immunology (Internal Medicine) Physician nationally: see state-by-state distribution →

Frequently Asked Questions

What is TIMOTHY KYIN, MD's specialty?
TIMOTHY KYIN, MD specializes in Allergy & Immunology (Internal Medicine) Physician and practices in CHARLOTTESVILLE, Virginia. Credentials: MD.
How much does TIMOTHY KYIN, MD prescribe under Medicare Part D?
In 2023, TIMOTHY KYIN, MD wrote 468 Medicare Part D claims totaling $400K in drug costs for 122 beneficiaries.
What is TIMOTHY KYIN, MD's Medicare quality score?
TIMOTHY KYIN, MD has a CMS MIPS Final Score of 79.3949/100 (Quality: 73.6607, Cost: 57.6556). The national average MIPS Final Score is 83.1. Source: CMS Merit-based Incentive Payment System (MIPS) 2023.
Where is TIMOTHY KYIN, MD located?
TIMOTHY KYIN, MD is located at 2955 IVY RD, CHARLOTTESVILLE, VA, 22903. Phone: (434) 924-2227.
What is TIMOTHY KYIN, MD's NPI number?
TIMOTHY KYIN, MD's National Provider Identifier (NPI) is 1548381866, issued on 04/03/2007.
Does TIMOTHY KYIN, MD prescribe more brand-name or generic drugs?
TIMOTHY KYIN, MD's prescribing is 44% brand-name and 56% generic drugs by claim count, with $368K in brand drug costs.
How many Allergy & Immunology (Internal Medicine) Physician providers are there in the US?
There are 520 Allergy & Immunology (Internal Medicine) Physician providers across 48 states in the US. The average Allergy & Immunology (Internal Medicine) Physician provider writes 798 Medicare Part D claims per year.
What drugs does TIMOTHY KYIN, MD prescribe most often?
Based on 2023 Medicare Part D data, TIMOTHY KYIN, MD's most frequently prescribed drugs include Montelukast Sodium, Prednisone, Symbicort. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does TIMOTHY KYIN, MD accept Medicare?
TIMOTHY KYIN, MD appears in CMS Medicare data with 468 Part D claims and 122 Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify TIMOTHY KYIN, MD's credentials?
TIMOTHY KYIN, MD's NPI is 1548381866 with credentials MD. You can verify this through the NPPES NPI Registry, check state medical board records, and confirm board certification through the ABMS or AOA.

Data Sources

Provider Directory
CMS National Plan and Provider Enumeration System (NPPES), download.cms.gov/nppes, updated monthly. Contains NPI, specialty, credentials, and practice location.
Specialty Classification
NUCC Health Care Provider Taxonomy (nucc.org), the industry standard for classifying provider specialties in Medicare and Medicaid billing.
Prescribing Data
CMS Medicare Part D Prescriber Public Use File (2023). Includes claims, drug costs, beneficiaries, and opioid prescribing rates.
Quality Performance
CMS Merit-based Incentive Payment System (MIPS) — 2023 performance year.
Limitations
Provider data is self-reported to CMS. Prescribing data reflects Medicare Part D only and does not include commercial insurance, Medicaid, or cash prescriptions. Claims below 11 beneficiaries are suppressed by CMS for privacy.

See our complete data methodology for details on how we collect and process government data.

Data as of April 2026 (NPPES) / 2023 (Medicare Part D). Source: Centers for Medicare & Medicaid Services (CMS).

Disclaimer: Data from CMS NPPES and Medicare Part D. PlainDoctor does not rate or rank providers. Provider information is self-reported and may not be current. Always verify information directly with the provider. About · Methodology